diff --git a/src/backend/sdl.c b/src/backend/sdl.c
index 9f74bd9..edc213b 100644
--- a/src/backend/sdl.c
+++ b/src/backend/sdl.c
@@ -7,6 +7,7 @@
 #include "../concurrent/msg.h"
 #include "../concurrent/msgq.h"
 #include "../concurrent/pubsub.h"
+#include "../geom/graphics.h"
 #include <unistd.h>
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_ttf.h>
@@ -298,17 +299,67 @@ fail:
     ASSERT(rv == 0, "error: %s", SDL_GetError());
 }
 
+/* -----------------------------------------------------------------------------
+ * Rendering
+ * -------------------------------------------------------------------------- */
+
+static void draw_clear(SDL_Renderer* r, uint64_t bg);
+static void draw_glyph(SDL_Renderer* r, const struct ax_glyph* gl);
+
 static void render_windows(struct window_list* wl)
 {
     for (; wl != NULL; wl = wl->next) {
-        // SDL_Window* sdl_win = wl->handle->win;
         SDL_Renderer* r = wl->handle->rnd;
-        SDL_SetRenderDrawColor(r, 255, 255, 255, 255);
-        SDL_RenderClear(r);
+
+        pthread_mutex_lock(&wl->win->mx);
+        struct ax_graphics* gr = wl->win->graphics;
+        draw_clear(r, gr->bg);
+        for (size_t i = 0; i < ax__graphics_glyph_count(gr); i++) {
+            draw_glyph(r, ax__graphics_glyph(gr, i));
+        }
+        pthread_mutex_unlock(&wl->win->mx);
+
         SDL_RenderPresent(r);
     }
 }
 
+static void draw_set_color(SDL_Renderer* r, uint64_t col)
+{
+    SDL_SetRenderDrawColor(r,
+                           (col & 0xff0000) >> 16,
+                           (col & 0x00ff00) >> 8,
+                           (col & 0x0000ff) >> 0,
+                           255);
+}
+
+static void draw_clear(SDL_Renderer* r, uint64_t bg)
+{
+    draw_set_color(r, bg);
+    SDL_RenderClear(r);
+}
+
+static void draw_glyph(SDL_Renderer* r, const struct ax_glyph* gl)
+{
+    switch (gl->ty) {
+    case AX_GLYPH_RECT:
+        draw_set_color(r, gl->d.rect.f);
+        SDL_RenderFillRect(r, &(SDL_Rect) {
+                        .x = gl->d.rect.x,
+                        .y = gl->d.rect.y,
+                        .w = gl->d.rect.w,
+                        .h = gl->d.rect.h
+                    });
+        break;
+
+    default: {
+        enum ax_glyph_type val = gl->ty;
+        const char* str;
+#include "../../_build/glyph.printer.inc"
+        ASSERT(0, "unimplemented glyph type `%s'", str);
+    }
+    }
+}
+
 /* -----------------------------------------------------------------------------
  * Event handling
  * -------------------------------------------------------------------------- */
diff --git a/test/main.c b/test/main.c
index 346d72b..9db0810 100644
--- a/test/main.c
+++ b/test/main.c
@@ -35,7 +35,7 @@ static struct ax_window* make_window()
 {
     ax_begin_window(ax);
     ax_set_window_title(ax, "Test App");
-    ax_set_window_size(ax, 1000, 400, false);
+    ax_set_window_size(ax, 800, 600, false);
     return ax_end_window(ax);
 }